History of gun control in America

The House recently approved a measure that would provide more money for background checks on gun buyers nearly a week after a mass murder in California left seven people dead. Take a look at the history of gun control in America.

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Kevin Lamarque / Reuters

Also, a petition asking the White House to immediately press Congress for tighter restrictions on gun ownership has garnered more signatures than any other ever posted to the White House's website. As of Monday afternoon, more than 150,700 people had signed it.